Miley CyrusMiley Cyrus and her crew are mourning the loss of one of their own today. The driver of one of the teen pop and county singer's tour buses was killed this morning in an accident outside of Richmond, Va., when the bus ran off the road and overturned. Miley was not aboard the bus when it crashed.

"It was one of our tour buses, but not Miley's," Miley's manager tells TMZ. "It was one of our buses that transported our lighting crew."

The vehicle was part of a four-bus caravan, and had 14 passengers on board. Nine other people suffered minor injuries.

Miley is still scheduled to perform in Greensboro, N.C. this Sunday, where the buses were headed.